Planooraph co



W. PODMORE.

LATHE. APPLICATION FILED NOV. 8,1915- RENEWED APR. 14, 1:)!!!- 1 309,046. Patented July 8, 1919.

. I I gflSMETS-SHEET I. .1 j a: 9

W.PODIV1ORE.

LATHE. APPLICATION FILED NOV. 8, I915. RENEWED APR. 14,1919. 1,309,046.

Patented m 8, 1919.

3 SHEETS-SHEET 2.

W. PODMORE.

LATHE.

APPLICAT IU'N HLED NOV. 8, 1915- RENEWED APR. 14, I919.

1,309,046, 7 Patented July 8, 1919.

3 SHEETS-SHEET 3.

, UNITED STATES PATENT OFFICE.

WILLIAM PoDMonE, on PORTHILL, STOKE-UPON-TRENT, ENGLAND, AssIGNon OF ONE-HALF To HENRY LEWIS DOULTON, on LONDON, ENGLAND.

LA HE.

I Specification of Letters Patent. 1 i Patented July 8, 1919.

I Application filed NovemberB, 1915, Seria1 No. 60,405. Renewed. April 14,1 19. Serial No. 290,109..

To all whom it may concern." I I Be it known that I, WILLIAM PoDMoRE,

\ a subject of the King of Great Britain and Ireland, and resident of Porthill, Stokeupon-Trent, England," have invented new and useful Improvements in Lathes, of

which the following is a-specification.

This invention refers to apparatusor Inachinery for shaping clay while in an unbaked state, and it relates in particular to machines of the kind designed to effect the external shaping (profiling) of the clay blanks of telegraph insulators and the like.

The object of the invention is to provide a construction of machine in which the clay blanks, after being internally bored and after the smaller boring in the head of the blank has; been screw-threaded, maybe (partly sectional) and placed and readily and accurately turned or shaped to the required external pro. e.

d A further obj'ectis to provide a machine in which the shaping tools are of a simple character, and do'not call for any delicate or elaborate adjustment'to'insure theiraecurate operation, the whole machine being such as to allow of its being worked by unskilled labor, and to be easily altered "or adjustedto suit the various shapes and sizes of insulators to be produced.

Upon the accompanying drawings, Figure 1 illustrates a front elevation Fig. 2' is a plan of the improved machine, certain of the parts in Fig. 2 bein shown iBI I- a position difi'erent from that shown in ig. 1. v

ig. 3 illustrates a further plan view, with certain of the parts in a position difierent' from that shown either in Fig.1 or 1g. 2. V I p Fig. 4.- illustrates a plan view of a detail part of the machine, embodying a inodi fication hereinafter described. 1 d

Fig. 5 illustrates a transverse sectional elevation of the machine on line 11- 4) of Fig. 1, lool'ring from the right hand end of the ma chine.

operations:

andj y of 'Fig." respectively. In these Fig. 12illustrates a plan and Fig. 13 a front elevation of a modification hereinafter 2 described.

According to the invention, the improved machine comprises a lathe head-stock a, with shaft 7) fitted with variable speed pulleys c.

The shaft 5 extends beyond the end of the head-stock, and is provided with a screw threaded part '5 the thread of which cor.- responds with that of the thread of the smaller boring; of the insulator blank, and

that 'iofvth-e Tod y Which the finished insul lator will eventually be supported. Carried by, and preferably formed in one with the shaft 6'', is a flanged sleeve (Z, over which the skirt 'or outer part ofthe insulator. blank will fit when placed on the screwed part of the shaft 6, see Fig. 1, the end of the said shaft part coming against the flanged end of the sleeve (Z when the screw thread has fully entered the: boring, and thereby pre- Venting any further endWiS traverse of the insulator blank. Between the sleeve and shaft is an annular space in which the central pipe portion'of the insulator may lie when on the'shaft.

To the rearof the said shaft b is arranged I a rode supported rotatably andslidably in bearing brackets f f "At or near oneend, such rod is provided with a handle 9, and at the other end'it is'connect'e'd'b-y a cord or chain it, working over a pulley '2', to a small weight 7' suflicient to overcome the friction of the rod inits bearing brackets. For a portion of its length between the brackets f 7, the shaft 6 is formed square and wider than at the other parts, and upon such square'and wider part, see Figs. 2 and 5,"i1s7:1.d i1stably'fixed a fl at metalprofiling too This profiling'tool consists preferably of a pose of sheet steel, the forward edge of The army? slides against the rear face of the rail 39 when the tools 75 and'm are brought to the horizontal and are moved endwise to engage the work, see Figs; 6' and 7, the arm 0 meets andbears against the front face. of the rail 7) when the tool 0 has effected the full cutting operation, and the arm-"g meets and bears against the rear face of the rail when the tools is and m are'tilted up out of the way, see Figs. 1 and 5.

U By the arrangement of tools "described l and their manipulation in the manner indicated, insulators and the like can be rapidly and accurately shaped by unskilled labor. Further, the tools employed and method of supporting them are such as to call for no delicacy in adjusting them, neither are they such as to be liable to change their position when in operation and spoil the shape of the insulator.

To allow of the position of the tool being varied to suit insulators of larger or smaller diameter, it is only necessary to slacken the set screws k move the tool in or out and re-tighten the set screws. The same applies to the tools m, 0. Similarly, should a different profile be required, the tools is, m, 0 are readily removed and new tools substituted. Of course, there may be more than one scalloping tool for effecting the pre liminary rough shaping. There may be also two finishing tools is, or a tool 0 suitable for forming more than one neck or corrugation, or two or more tools 0 for operating upon different parts of the work. The shaft 6 will preferably be rotated in the direction of the arrow, Fig. 7 so as to cause the debris to fall below the tool in. To allow for the shaping of insulator blanks, the cylindrical body parts of which require to be of conical formation, the bearing brackets 7, f will be carried by a swiveling base part f see Fig. l, the said parts being held firmly in position (after being swiveled) by bolts and nuts f To prevent the rod e rotating while the tools is, m are moving endwise, there may be two rails 7 [9 see Fig. 4, the arm 9 being caused to pass between them prior to the rod e being moved endwise to feed the tools is, m against the work. i

As shown in Figs. 12 and 13, the sheet metal cutter is, may be replaced by a plate 2, and a steel blade 29, the latter being sh'arp ened on one edge, and being in plan (see Fig. 12) bent to the desired preliminary contour of the intended insulator. The blade t which is secured at each end by set studs u to the ends of the plate t lies at a slight distance from the plate 25 so as to leave a clearance space t between the blade and plate through which the debris (turnings) may pass during the shaping operation. To

The scalloping tool m, instead of being in the form ofa loop', Fig.9, may be in the form of 'a half loop see Fig-12;

The tool forjnecking or finally shaping may also be in the form of a scalloping cutter, i, 6, it may comprise a plate 0 and a steel cutter blade 0 the latter bent to the intended shape'of" insulator, and secured at eac-h end to the plate '0, which is also shaped so as to leave a clearance space for the debris between itself and the blade. Stays 'v", o serve to hold the blade against deflection.

In this form of necking or finishing tool, the plate 4) may carry a small edge trimmer o for rounding off the end of the skirt part of the insulator simultaneously with the necking of the head part of the insulator. Such edge trimmer will be ad justably held in position by a clamping block to and bolt and nut w.

What I claim is 1. In apparatus for externally shaping clay in the manufacture of telegraph insulators and the like, the combination with a rotary shaft adapted to hold and rotate the work during the shaping operations, of a sliding and revoluble rod and a series of tools, adjustably mounted upon the said rod, two of said tools operating upon the clay successively by being moved endwise, and the other tool or tools operating upon the clay after the other tools have completed their work by being fed against the work in the arc of a circle, a fixed rail alongside and parallel with the sliding rod, said rail having a gap in its upper edge, arms on the sliding rod adapted to bear against the said rail and thereby limit the angular movements of the rod and tools, as well as guide the rod and tools when moved endwise, and one of said arms also being adapted to pass through the gap in the rail when brought opposite thereto, as set forth.

2. In apparatus for externally shaping clay in the manufacture of telegraph insulators and the like, the combination with a rotary shaft adapted to hold and rotate the work during the shaping operations, of a sliding and revoluble rod, a profiling tool secured to said rod for imparting a preliminary profiling to the work, a further tool also secured to the said rod and lying in advance of the said profiling tool for removing the excess clay preparatory to the said profiling tool operating upon the work, the two tools operating upon the work under the endwise movement of the rod, two further tools upon the said rod, one for imparting a finished profiling to the work from end to end, and the other for trimming the wider side and parallel with the sliding rod and h i a s -P n t pper edge, a m o t sliding rod, adapted to bear against the said rail and thereby limit the angular .movements of the rod and tools as ell as guide the rod and tools when moved endwise,

Copies of this patent may the obtained of five gents eaph, py edglregsi ng the ifionrimissi ol er f letents,

Was n on, n-

and one of said arms also being adapted to 10 pa s throug th p t e m wh b ought pp i e her t as set fort Inv itness whereofl l have hereunto set my hand in the presence of 'two Witnesses. P M E- Witnesses: 11 mm BEINIAH,"

P TI PLANT. 

